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PHRF-Lake Ontario
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  1. You are here:  
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  3. Publications
  4. Time on Time
  5. History
 

History

History of Time on Time

History
At the inception of PHRF-Lake Ontario, Time-on-Time scoring was proposed and included in the PHRF-LO Charter.  Although Time-on-Time scoring is not new, Lake Ontario was, to the best of our knowledge, the first to implement it through PHRF handicapping. Subsequent to the initial inclusion, Charles Kramer of Sodus Bay Yacht Club, a PHRF-LO Handicapper, completed an analysis and derived the following formula based in part on his interpretation of the published results of the original H. Irving Pratt Ocean Race Handicapping project at M.I.T.  This formula was adopted by PHRF-LO in 1985 and represents an improvement over the conversion method that was initially used.

Q = .045
S = Scratch Boat = ASP 171
R = (8.36 x 106) ÷ ((ASP + 384.3)2)
RS = (8.36 x 106) ÷ ((171+ 384.3)2)
TOT = ((1 ÷ √RS + Q) ÷ ((1 ÷ √R) +Q))
or TOT = (685.411 ÷ (ASP + 514.411))

Details
Category: History of Time on Time
Last Updated: 30 March 2017

New for 2010

In March of 2010, the Central Council of Handicappers for PHRF-LO looked further into our Time on Time numbers and decided that they would look more closely at the the current scratch boat (presently 177) in our time on time formula.

Details
Category: History of Time on Time
Last Updated: 23 February 2021

New for 2009

In November of 2008, the Central Council of Handicappers for PHRF-LO voted in favour of adjusting the Q.Factor in our Time on Time formula to .008 from .045.

Details
Category: History of Time on Time
Last Updated: 23 February 2021

New for 2006

In March of 2006, PHRF-LO voted in favour of adjusting all our handicaps by +6 sec/nm.

Details
Category: History of Time on Time
Last Updated: 02 January 2025

2010 Time on Time Values

Your Time on Time values have changed

 

Details
Category: History of Time on Time
Last Updated: 30 March 2017

Time On Time Study

As you may or may not be aware, PHRF-LO has adjusted the Time on Time numbers used for calculating your race results.